Acetylene-gas lamp.



may be PAUL WERNER LOHMANN, 0F

WORTHINGTON, WEST VIRGINIA, ASSIGNOR TO THE LOHMANN-HOLD MANUFACTURINGCOMPANY, INC., OF PITTSBURGH, PENNSYL- VANIA.

Specification of Letters Patent.

AcETYLENE-Giis LAMP.

Patented Nov. 18, 1913.

Application filed January 9, 1913. Serial No. 741,127.

To all whom it may concern Be it known that I, PAUL VERNER LOH- MANN, asubject of the Emperor of Germany, residing at Worthington, in thecounty of Marion and State of West Virginia, have invented certain newand use ful Improvements in Acetylene-Gas Lamps; and I do declare thefollowing to be a full,

clear, and exact description of the invention,

such as will enable others skilled in the art to which it appertains tomake and use the same.

This invention relates to improvements in acetylene lamps andparticularly to acetylene lamps for the use of miners.

One object of the invention is to provide an acetylene lamp having animproved construction and arrangement of multiple gas generatingchambers whereby, when the carbid in one chamber is being renewed theother chamber may be put in operation thereby permitting the lamp to bekept continually burning.

Another object is to provide a lamp of this character which will besimple, strong, durable and inexpensive in construction, efficient andreliable in operation and which quickly and easily started andcontrolled.

W'ith these and other objects in view, the invention consists of certainnovel features of construction, and the combination and arrangement ofparts as will be more fully described and claimed. 7

In the accompanying drawings: Figure 1 is a front view of myimprovedacetylene lamp; Fig. 2 is a central vertical longitudinal sectionthereof; Fig. 3 is'a horizontal sectional View taken on the line 33 ofFig. 2; Fig. 4. is a similar view taken on the line 44 of. Fig. 2; Fig.5 is an enlarged detail horizontal sectional view of the outer ends ofthe gas conducting tubes and the double burner tips applied thereto.

y improved acetylene lamp comprises a main generating chamber 1 whichforms the base of the lamp and has on its upper end a reduced threadedneck 2 adapted to be screwed into engagement with a socket 3, the upperportion of which forms the gas chamber 4 for the generator 1. The upperportion of the socket which forms the gas chamber 4 is reduced andformsan annular shoulder 5 between which and the upper edge of the neck 2 ofthe generator chamber 1 is secured the outer edge of a concaved gauzepartition 6 and the outer edge of a filtering pad 7 formed of felt orother suitable ma terial through which and through said gauze partition6 the gas from the generating chamber 1 is adapted to pass into the maingas chamber 4.

The upper end of the main gas chamber 4 is closed by a generatingchamber 8 the upper portion of which is threaded exteriorly to receivean interiorly threaded annular flange 9 on the lower end of a waterchamber or reservoir 10 which forms the upper portion of the lamp and ishere shown as being provided with a concaved top in which is formedafilling opening 11, said opening being normally closed by a screw plug12. The upper edge of the sup plemental gas generating chamber 8 isturned inwardly to a slight extent to form a flange 13 above which andwithin an annular recess in the bottom of the water tank atits outeredge is arranged a rubber gasket or packing ring 14 whereby the gasgenerated in the chamber 8 is prevented from escaping through thethreaded connection between the flange 9 and said generating chamber.

Arranged on the inner side of the generating chamber 8 near its upperedge is an annular inwardly extending flange 15 between which and theadjacent lower side of the bottom of the water chamber is clamped theedges of a concave gauze partition 16 and a filtering pad 17 formedoffelt or other suitable material and through which the gas generated inthe chamber 8 passes into a gas receiving compartment 19 formed in thecenter of the pad 17 and beneath the central-portion of the bottom ofthe water reservoir. The gas compartment 19 is connected by a gasconducting tube 20 with a supplemental gas chamber 21 Whose wall standswithin the main gas chamber 4 as shown.

Arranged through the Water reservoir 10 and extendin downwardly throughthe tube 20 and t e su plemental gas chamber 21 and through t efiltering pad 7 and gauze partition 6 and into the main gas generatingchamber 1 is a. main water conducting tube comprising an upper section'22 which is secured in the top and bottom of the reservoir 10 and hasits lower end projecting a short distance below the bottom of thereservoir and adapted to fit into the upper end of the lower section 23of the tube, said lower section being secured to the bottom of thesupplemental gas chamber 21 as shown. In thus arranging the main waterconducting tube it will be seen that' when the reservoir 10 is removedfrom the supplemental gas generating chamber 8 the upper section of thetube will be detached from the lower section and removed with the watertank and in order to provide a fluid and gas tight connection betweenthe adjoining ends of the tube sections 22 and 23 I- provide an annularflange 24 which is secured to the lower section of the tube adjacent .toits upper end and engaged with said flange and on the upper end of thelower tube section 23 is a washer or packing ring 25 which, when theparts are assembled is clamped between the flange 24 and the bottom ofthe reservoir 10 and forms a fluid tight closure for the engaging endsof the sections of the tube. In the upper section 22 of the water tubenear the bottom of the reservoir 10 is formed a water dischargingpassage 26 which is adapted to be opened and'closcd by a valve 27, saidvalve being here shown and is constructed in the form of a wire rodwhich extends entirely through the tube and has a fluid tight connectiontherewith. In one side of the valve rod is formed a water conductinggroove or channel 28 which extends from a point immediately above thewater discharging passage 26 to the lower end of the rod whereby whenthe latter is turned to bring the groove in engagement with the passage26 the water from the reservoir is permitted to flow through the tubeand groove in the valve rod and is conducted by these parts to the lowerportion of the main chamber 1 whereby the carbid therein is moistenedand the gas thus generated in this chamber. The upper end of the rod 27extends a short distance above the top of the reservoir 10 and hasformed on its upper end a suitable handle 29 whereby the rod may beoperated to bring the groove 28 into and out of alinement with thepassage 26 in the Water conducting tube thereby permitting water to flowfrom the reservoir onto the carbid in the main generating chamber.

Water is supplied to the carbid in the supplemental generating chamber 8through a water conducting tube or pipe 30 which extends through thereservoir and has its lower end projecting through the filtering pad andpartition of the supplemental generating chamberand extending downintosaid chamber as shown. In the tube or pipe 30 near the bottom of thereservoir 1s a water discharging opening 31 which is normally closed bya valve 32 in the form of a wire rod which extends through the tube andclosely fits the latter. The lower end of the valve rod 32 is reduced asshown at 33 so that when the rod is pulled upwardly in the tube 30 andsaid reduced portion brought opposite to the discharge opening 31 thewater will flow through the latter from the reservoir 10 into the lowerend of the pipe 30 which will conduct the Water into the supplemental asgenerating chamber and onto the car id therein, thereby causing theformation of gas in this chamber which will pass through the partition16 and filtering pad 17 thereof into the com partment 19 from whence thegas passes through the tube 20 into the supplemental gas chamber 21. Theupper end of the valve rod 32 projects a short distance above the upperend of the tube or pipe 30 and above the reservoir 10 and has its upperend bent to form a handle 32 whereby the rod may be operated to open andclose the dis charge opening 31 in the manner described.

ounce ed respectively with the main gas chamber 4 and the supplementalgas chamber 21 are gas conducting pipes 34 and 35 the outer ends ofwhich are bound together by a sleeve 36. \Vith the ends of the pipes 34and 35 is engaged a burner tip 3 of double form or having independentgas passages 37 and 37 which connect respectively with the pipes 34 and35 as shown. On the sleeve 36 and surrounding the tip 37 1s a reflector38 of any suitable construction.

Secured at its inner end to one side of the supplemental gas generatingchamber, and to the adjacent side of the socket 3 with which the maingenerating chamber is engaged is a hook shaped handle 39 whereby thelamp may be engaged with a miners cap or with any suitable support. Byarranging the handle as herein shown and described the inner end thereofforms a brace between the socket 3 and the supplemental generatingchamber whereby the structure of these parts is greatly strengthened.

In the operation of the lamp the valve of the water conducting tube ofthe main generating chamber is opened to permit the desired quantity ofwater to flow onto the carbid in the main generating chamber, thuscausing a supply of gas to be formed and discharged into the main gasreceiving chamber from which it passes to the burner tip through thedischarge pipe 34 and is burned. When the carbid in the main generatingchamber has been exhausted and requires renewal the valve of thischamber is closed and the valve of the water supply pipe for thesupplemental gas generating chamber is opened, thus causing the gas toform in this chamber. This gas passes to the supplemental gas receivingchamber and from thence through the discharge pipe 35 to the burner tipthereby ermitting the continued use of the lamp w i in the maingenerating chamber is re;-

1c the carbid 18 newed. As soon as the carbid in the main chamber hasbeen renewed and this chamber again placed in position on the lamp, thewater conducting mechanism thereof is opened and the water conductingmechanism of the supplemental generating chamber closed, thus stoppingthe generation of gas in the supplemental chamber and again producinggas in the main chamber. This construction and arrangement of the lamppermits the same to be continuously used and greatly facilitates therecharging of the generating chambers thereof.

From the foregoing description taken in connection with the accompanyingdrawings, the construction and operation of the invention will bereadily understood without requiring a more extended explanation.

Various changes in the form, proportion and the minor details ofconstruction may be resorted to without departing from the principle orsacrificing any of the advan tages of the invention as claimed.

Having thus described my invention, what I claim is:

1. The herein described acetylene generating lamp comprising a baseforming a main generating chamber and having a reduced and threadedneck, the main gas chamber having a threaded socket engaging said neck;a supplemental gas chamber located within the main gas chamber, separateoutlet pipes leading from said chambers to a common burner, asupplemental generating chamber whose bottom wall forms the top ofsaid'gas chambers, a water reservoir having a threaded connection withsaid generating chamber, a pipe leading from the latter into thesupplemental gas chamber, a water pipe leading from the reservoirthrough said gas pipe and throughout both gas chambers into the mainchamber, a second water pipe leading from the reservoir into thesupplemental chamber, and means for controlling the flow of waterthrough said pipes.

2. An acetylene lamp of the character described comprising a waterreservoir, a supplemental gas generating chamber having its upper endattached thereto, a as conducting tube secured in said supp emental gasgenerating chamber and opening through the bottom thereof, asupplemental gas receiving chamber secured to the bottom of saidsupplemental generating chamber over the lower end of said tube, athreaded socket secured to the bottom of said supple mental generatingchamber, a main gas generating chamber having a reduced threaded neckadapted to be screwed into said socket, independent water conductingtubes connecting the reservoir with said main and supplemental gasgenerating chambers, valves to control the discharge of Water throughsaid tubes, main and supplemental gas conducting pipes connectedrespectively with said main and supplemental gas receiving chambers, anda burner tip having independent gas passages connected respectively withthe outer ends of said pipes.

3. An acetylene gas generating lamp comprising a water reservoir, mainand supplemental gas generating chambers connected with said reservoir,separate gas receiving chambers connected with said generating chambers,a. main water conducting tube formed in upper and lower separablesections, the upper section being secured to said water reservoir, apacket.- joint between said sections. a controlling valve for said tube,a supplemental water conducting tube arranged in said reservoir andconnected at its lower end with said supplemental gas generator, acontrolling valve for this tube, gas filtering pads arranged betweensaid gas generating chambers and their respective gas receivingchambers, independent gas conducting pipes connected with said gasreceiving chambers, and a burner tip having independent connections withsaid pipes.

In testimony whereof I have hereunto set my hand in presence of twosubscribing witnesses.

PAUL WERNER LQHMANN. Witnesses JOSEPH KANN, S12,

G. W. MARTIN.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. C.

